"testing"

	utiltesting "k8s.io/client-go/util/testing"
	"k8s.io/mount-utils"
)

type fakeMounter struct {
	mount.FakeMounter
}

// IsLikelyNotMountPoint overrides mount.FakeMounter.IsLikelyNotMountPoint for our use.
func (f *fakeMounter) IsLikelyNotMountPoint(file string) (bool, error) {
	name := filepath.Base(file)
	if strings.HasPrefix(name, "mount") {
		return false, nil
	}
	if strings.HasPrefix(name, "err") {

	return c.TearDownAt(c.GetPath())
}

func (c *nfsUnmounter) TearDownAt(dir string) error {
	// Use extensiveMountPointCheck to consult /proc/mounts. We can't use faster
	// IsLikelyNotMountPoint (lstat()), since there may be root_squash on the
	// NFS server and kubelet may not be able to do lstat/stat() there.
	forceUnmounter, ok := c.mounter.(mount.MounterForceUnmounter)
	if ok {